| senile(tired, gray, mature, enervated, aged) |
| senior(tired, gray, mature, aged, older) |
| sick(adjective, mean, bad, weak, delicate) |
| sick as a dog(expression, adjective, idiom, mean, bad) |
| sick as dog(expression, adjective, idiom, mean, sick) |
| skilled(tired, gray, mature, aged, older) |
| suffering(adjective, mean, bad, weak, delicate) |
| superannuated(tired, gray, mature, aged, older) |
| tatty(adjective, degenerate, bare, shabby, meager) |
| tired(gray, mature, dissatisfied, aged, older) |
| tottering(mean, weak, down, ill, sick) |
| under medication(expression, adjective, mean, bad, weak) |
| under the weather(expression, idiom, mean, sick, green) |
| unhealthy(mean, weak, down, sick, feeble) |
| unwell(adjective, mean, bad, weak, delicate) |
| useless |
| venerable(tired, gray, mature, aged, older) |
| versed(tired, gray, mature, aged, older) |
| veteran(tired, gray, mature, aged, older) |
| wasted(tired, gray, mature, aged, older) |